Lock switch



Oct. 30, 1934. G. L. CARLISLE LOCK SWITCH Filed May 31, 1930 2 Sheets-Sheet 1 glwue-nfo'o George Z. Oarlz'ale Oct. 30, 1934. CARUSLE 1,979,097

LOCK SWITCH Filed May 31, 1930 2 Sheets-Sheet 2 Georgel. Oarlz'sle Patented Oct. 30, 1934 T-OF F LOCK SWITCH George Lamar Carlisle, Huntington, W. Va., as-

signor --to The Champion Switch Company, .Kenova, Van, a corporation of Ohio Application May 31, 1930, Serial No; 458,434

'9 Claims. (Cl. 200.169)

This inventionis an electric lock switch for heavy, dutydisconnects where 'it is desirable to provide a suitable locking means for holding the .switch lockediin operative position and arreleasing .means which :permits theyswitch to be easily 0p- -erated for :openingand closingoi electrical circuits.

In-switches designedfor heavy duty to act'as electrical disconnects it'is :desirable to provide a structure capable of givinggood .contact and to preventinjury to the releasing means when the switch .15 pulledropenior forced into closed :posi- 'tion. -My:inventioniaccomplishes the result of "providing .a sturdyistructure, capable of withstanding the fwear=and. tear in the operation of switches of this-,naturemnd .having particular means ito protect thereleasingsmeans of the lock 'ofthe'switch.

,A further development of the ;present invention 29 is to provide a switch structure-wherein the locking mechanism is carried in a head portion secured-to the end of one of the bladeszof the switch, while thewther blade, is adapted :to =cooperate and form the-floating :blade :for; easy engagement of the switch .overzthe .connecting terminal. The

invention includes a formation and structure adapted toz cause ,the floating blade to carry in line with the ;head which. carries the docking .andreleasing means; and to prevent lagging .of the .fioat- ".30 king bladein the openingand closing of the same.

These features, together with other details and .objectswill be more clearlyand :fully-setierth in the specification .andnclaims In the drawings forming part of this.- specidca;

Figure ,1 is a side elevation of my switch. 1

Figure ,-2;is;a :plan view :of the same, Figure 3 is an enlarged detail portion of .my switchshowing the 'operationof the lock and ree n -m n Figure 4 is anenlarged .sectional viewon the line 44=,-of Figure 2.;

Figure 5 illustrates anotherdorm of my :switch. In the drawings .my ,heavysduty electric disconnectiswitchh is provided with the terminals .10 and -1-1 which extend upward from :the base portionslZ and 13, respectively. .The base portions-12 and 13 maybe supported on suitable insulator-5,13, only a portion of which is illustrated. The base portions 12 and 13 are formed 18to cause the blades to:frictiona11y contact with 'the'terminaI IO. The iree+endF19 ofthe blade 15 extends beyond theend120 of the blade .16 'andis adapted to support the lockingzand releasing head C for the switch A. The'headCof my switch is 30 rigidly supported to the free end :19 0f the :blade 15 and'is provided with a side plate 21 which is rigidly attached to thespacing'blocks 22 by the rivets I23 to rigidly secure the end'19 and the side plate 21 to the spacing blocks '22 and provide a B5 casingin which the'lock mechanism D is housed. The lock-mechanism D of my switch A is provided with a'locking tongue 24 which slides freely between the blocks 22 and the free end of'which engages'in the notch 25 formed inthe terminal 11 10 ofmy switch. The 1ocking-tongue24 is provided with a central longitudinal recess 26 in which a coil spring 27 is positioned andan operating pin 28'having-a head 29. The pin 28 extends into the coils of thespring27'and the head 29 is adapted to bear against the cam shoulderSO of thereleasing member 31. The member 31 is formed with pins- 32 spaced on either side of the cam end'30 and whichare adapted to engage with the shoultier ends 33 0f the tongue '24. The shoulder+ends 0 33am of a flat-nature and extend on either side of the tongue 24. The releasing-members 3l together with the locking tongue '24 are pivotally connected by the supporting bolt 34.- and when the parts are in operative position,- as illustrated in 5 -Figure-4,*whenthe releasing member 31 is moved up or downthe tongue 24 is disengaged from looking position in the notch 24, as illustratedin Figure 3 in full and dottedlines. The operation'o'f the releasing member 31 causes eitherof the pins 32 to engage against the shoulder ends 33 and pull the free end of thelocking tongue 24 out ofthe notch *25 of the terminal member 11, thus releasing the Switchblade so that the switch A may be disconnected from the terminal 11 or connected thereto.

The releasing member '31 is formed with a large engaging'eyeBS on the outer end of the "same and is provided with transverse shoulder members 36 which project on-either side of the releasing member 31, as illustrated more clearly in Figure 2. The free end 190f thebla'de 15 and the outer end of the plate 21 are formed with angularly disposed edges 3'7 which extend in line with each other and which are-adapted to form 1-05 stops against whichthe shoulder members 36 are adapted'to engage in the'rotation of thereleasing member 31 in the disconnectingof the switch 'A when force is exerted to the operating eye 35, as illustrated in Figure 3. Thus when the switch no A is unlocked or forced into locking position, one of the pins 32 will engage with one of the shoulders 33 to pull the locking tongue 24 out of locking position, and any undue force instead of being carried by either of the pins 32 or the shoulder ends 33, is directed through the stops 36 to the shoulder edges 37 formed on the head C, and in this manner the releasing means of the lock D is protected against injury by any undue force being exerted in the locking or unlocking of the switch A.

Thus should the operator of the switch A ierk or extend undue force against the releasing mem-- ber 31, the shoulders 36 will engage against the stop edges 37 so as to carry more than the necessary strain for operating the lock D, and thereby prevent injury to thelock parts and further providing a very efiective and durable lock structure for the switch A.

and 16 are held by suitable spring washer'members38 and bolts 39 to provide the resiliency for the blades in the engagement of the terminal 11, the blade 16 acting as the floating blade to compensate for the engagement with the terminal 11, while the blade 15 extends in a manner to support the operating head C. The sturdy structure of this form of lock provides an electrical disconnect switch adapted to heavy duty and one which cannot be easily put out of order even if abused in the locking and unlocking of the same. The blades operate to provide full contactsto' the terminals and thus the switch is eflicient, in operation.

In Figure 5 I have illustrated another form of my lock A where the free end of the blade 16 is arcuated' at 40 and adapted tofit into the arcuated edge 41- of the plate 21. This structure provides a means of causing the blade 16 to follow with the head C in the movement of the same and overcomes the lagging of the floating blade 16 in the operation of locking and unlocking of the switch A. This provides a simple and effective means of carrying the blade 16 in alinement with the blade 15 in the operation of the switch. In

the operation of the switch A it is apparent that the locking mechanism D must be of a compact nature to be contained within the head C between the end 19 and the plate 21'. The plate 21 extends virtually in line with the blade 16 and in making a lock with releasing means in a compact state and of this nature, some of the parts are small and without the protecting shoulders 36 which engage against the stopedges 3'7 the shoulder ends 33 might easily be broken 01f in the operationof the release 31. I have overcome this difliculty andprovide a very desirablestructure of heavy duty disconnect electrical switches.

In accordance withthe patent statutes I have described the principles of operationiof my electric disconnect switch with the locking mechanism and protective features therefor, and while I have endeavored to illustrate the best embodiment thereof I desire to have it understood that obvious variations and adaptations may be accomplished within the scope of the following claims without departing from the purpose and intent of the invention.

I claim: Y

1. In a locking switch, a pair of parallelly disposed switch blades, one of said blades being longer than the other, a locking head carried by said long blade, shoulders carried by said locking and means for limiting the movement of said releasing means to prevent straining thereof.

3. In combination, a pair of switch terminals, a pair of switch blades pivotally supported on one end to one of said terminals, one of said blades being shorter than the other, means for supporting said shorter blade floating in relation to the other of said blades and to resiliently engage the I other of said terminals, locking means carried In the operation of the switch A the blades 15 terminals, a pair of switch blades pivoted upon' one of said switch terminals, aswitch locking head secured to one of said blades, and means'for floatingly supporting the other of said blades to said one blade to hold said other blade in alinement with said one blade.

5. An electric heavy duty disconnect switch including, a pair of stationary switch terminals, long and short switch blades pivotally connected to one of said terminals, means for floatingly supporting said short switch blade, and a 'lockin head carried by said long switch blade.

6. In combination, a pair of stationary switch terminals, a pair of blades, means for holding said blades in a manner to engage said terminals under spring tension, a locking'head carried by one of said blades, anda recess in said head into which the free end of the other of said blades'is adapted to fit to cause said last blade to be operated in unison with the other blade against lagging in the opening or closing of said switch. v

7;. An electric disconnect switch including, a pair of stationary switch terminals, a long" and short switch blade extendingin parallel relation to each other, an operating end carried by said long switch blade, "means for contacting said blades over said switch terminals resiliently, and means for holding said blades in alinement'to prevent lagging in operation of opening and closing said switch. I I

8. An electric switch having a pair of stationary switch terminals, switch blades, an operating head carried by one of said blades, a notch formed in said head adapted to receive the end of the other of said blades, said other blade having an end shaped similarly to said notch to fit therein and GEORGE. LAMAR CARLISLE.

parallel 

